my $iostream = "iostream";
#    $iostream .= ".h" unless $o->{ILSM}{STD_IOSTREAM};
    if($o->{ILSM}{MAKEFILE}{CC} =~ /^cl/) { 
        $iostream .= ".h" 
            unless $o->{ILSM}{STD_IOSTREAM}; 
    }
    $o->{ILSM}{AUTO_INCLUDE} =~ s|%iostream%|$iostream|g;